Dental-engine bracket



(No Model.)

3 Sheets-Sheet 1.

W. A. KNOWLES.

DENTAL ENGINE BRACKET.

Patented Aug. 9, 1887.

FIG. 2.

INVENTUEL flaw/KM N. PETERS. PhutvLiihngraphan Wash'lrlgldll. v.0

3 S E L 0 N K A W DENTAL ENGINE BRACKET.

No. 368,154. Patented Aug. 9, 1887.

FIG. 4.

ATTEET. INVENTUR, %M@@ 5 6 (No Model.) 3 Sheets-Sheet 3.

W. A. KNOWLES.

DENTAL ENGINE BRACKET.

No. 368,154. I Patented Aug. 9, 1887.

F'Igb.

ATTEET, INVENTUR.

5%; %%w/ZM NITED STATES ATENT FFICE.

\VILLIAM A. KNOVLES, OF ALAMEDA, ASSIGNOR TO EDGAR THOMPSON, OF. SANFRANCISCO, CALIFORNIA.

DENTAL-ENGINE BRACKET.

SPECIFICATION forming part of Letters Patent No. 368,154, dated August9, 1887.

Application filed November 30, 1886. Serial No. 220.242. (No model.)

To all whom it may concern: the bracket G, near the outer end thereof,and

Be itknown that I, \VILLLlM A. KNOWLES, having within it a spiralspring, "5. a citizen of the United States, residing in Ala-Ircpresentsa tube or pipe, which is provided nieda, in the county ofAlameda and State of about midway its length with a slot,j. This 55California, have invented a new and useful tube I has its lower endresting on the spring Dental-Engine Bracket, of which the follow- 2' andhas its upper end extending beyond the ing is a specification. supportH.

My invention relates to dental engines for J represents the drill-headpost, which con drilling and other purposes,- and it consistsin sists ofa head,J, and a post, Jfijointed to- 60 the features of construction andcombinations gethcr, as atj, the joint being located in the of partshereinafter fully described and tube I, so that the head J isheld inavertical claimed. position. A set-screw, k, passes through the In thedrawings which form part of this support h, the slotj, and an openinginthepost specification, Figurelisaside elevation,partly J and bearsagainst the interior surface of the 6 5 in perspective, of a dentalengine embodying tube I.

my invention. Fig. 2 is a plan view of the K represents a pulley havingbearing in the same. Fig. 3 is alongitudinal vertical section head J,and fitting in an opening in the pulillustrating the means of attachingthe engine ley is a drill-spindle, L, carrying the usual to the wall ofthe room or any desired object. drill and inclosed by a sleeve, M. Thedrill Fig. I is a detail sectional view. Fig. 5 is a when not in use isdesigned to be supported detailview of thejointed postand gnidesleeve,by a hook, Z, secured to the sleeve 0.

; and Fig. 6 a detail perspective View showing N represents a cordconnecting the pulleys the device employed for keeping the driving- Kand It, said cord passing around the pulleys cord taut and regulatingthe tension of thelatg and o and through guides at in the tube 1.

ter. P represents a cord passing around the pul- Corresponding parts inthe several figures ley h and over pulleys a a, journaled upon the aredenoted by the same letters of reference. bracket 13. Below the latterare secured to Referring to the drawings, A represents a the wall of theroom or suitable object brackplate designed to be secured to awall andhavcts Q The bracket Q is provided with a 80 3o ing perforated lugs a.box, Q", to the ends of which are journaled B represents a bracket,which is provided pulleys Q" Q. Secured to said box Q} at its withperforated lugs connected by means of lower end and to the bracket Q atits upper pintles b to the lugs (1, whereby said bracket end is a rod,R, on which is a spiral spring, S. is pivoted in place. T represents acollar located on the rodand s 5 0 represents a sleeve, which is securedto clamped at any desired adjustment by a setthe lower end of thebracket B, and has near screw, 1'. The collar T is formed with a box,its outer end a clamping-collar, c, in an open- U, which has pulleys V Vjournaled to its ing of which is seated a set-screw, (1. ends. The cordP, after passsing over the Drepresentsabrace-rod,which extends frompulleys 1H4, is carried down under the pulleys 90 the upper end of thebracket B to the collar 0, Q Q, up over the pulleys V V, and then towhich it is secured, and which serves to supdown. It may then be passedaround a bandport and hold the outer end of the sleeve 0 in wheeloperated by atreadle orothcrwise. (Not a horizontal position. shown.)

E represents a tubular post secured to the It will be seen that bymoving the collar J outer end of the sleeve e, and secured to the Tupwardly the cord P will be tightened. upper end of the tubular post Eis a bracket, XVhen it is desired to extend the operating G, which hasupwardlyextending perforated mechanism, the collarTis moved downwardly,ears or lugs, between which are journaled pulthus loosening the cord P.The sleeve 6 may leys g g, and on the upper end of the shaft F then be drawu out of the sleeve 0 the desired I00 0 are mounted pulleys h h.distance and clamped in its adjusted position H represents a tubularsupport secured in by the setscrew.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination,with a stationary sleeve, of an adjustable sleeve, atubular post, E, secured to said adjustable sleeve, a shaft in saidpost, said shaft carrying pulleys, abracket, G, on the shaft F, atubular support, H, secured to the bracket G and having a spring, 6, theslotted tube I, the drill-head post consisting of two parts jointedtogether and adapted to support drilling mechanism, substantially as setforth.

2. The combination, with drilling mechan- 5 ism and its supports, of thepulleysK g g h h u u, the operating-cord P, a rod carrying a stationarypulley, and the box vertically adjustable on said rod and carryingpulleys V V, as set forth.

3. The combination, with atubular support 20 and a spring in the bottomthereof, of a vertically-adj ustable sleeve located in said support,

a drill-head post located in said sleeve, and a drill-head jointed tosaid post, substantially as described.

W'ILLIAM A. KNO\VLES.

Witnesses:

J 01m H. REDSTONE, Louis]; E. REDSTONE.

